1027 results about "Materials testing" patented technology

The invention relates to the technical field of material testing, and discloses a coating performance simulation method based on high and low temperature circulation and prestress loading. The method comprises the following steps: constructing a coating matrix composite geometric model containing a microporous structure by acquiring actually measured working condition data of a pipeline or a part, and quantifying surface roughness and interface curvature characteristics in combination with reverse engineering; a dynamic temperature-pressure coupling equation is generated based on the thermal expansion effect of a high-pressure medium, a micropore optical load is converted into equivalent heat flux density through a ray tracing algorithm, transient boundary conditions of a temperature field and a stress field are associated, a crack initiation path is simulated through an extended finite element method, and a life attenuation curve is predicted in combination with a Paris formula. And material parameters are dynamically corrected based on experimental data, and a multi-parameter collaborative optimization model is generated. According to the method, the problems of interface stress evaluation distortion and life prediction deviation under the combined load are solved, and multi-physics field co-simulation support is provided for coating compression resistance optimization.

The invention relates to the technical field of composite material detection, in particular to a fiber-reinforced thermosetting thermoplastic composite structure interface quality detection method and system.The method comprises the steps that vibration excitation is applied to a target area of the surface of a to-be-detected sample, and the amplitude of the excitation is lower than the damage critical value of a weak bonding interface; a dynamic response signal perpendicular to the interface is collected in a vibration field non-diffusion area of the excitation point of the target area; performing frequency domain transformation on the dynamic response signal, and separating a fundamental frequency component and at least one high-order harmonic frequency component; according to the nonlinear enhancement effect of the high-order harmonic frequency component relative to the fundamental wave frequency component, whether the weak bonding defect exists in the target area or not is judged. According to the method, the technical bottleneck that the dynamic evolution process of the weak bonding defect of the composite material interface is difficult to capture in real time is effectively solved, sensitive response to the microdefect is realized through a nonlinear harmonic characteristic enhancement effect, and the recognition precision of traditional ultrasonic detection is improved.

The utility model relates to the technical field of wave-absorbing material testing, and discloses a wave-absorbing material flat plate reflectivity testing device which comprises a flat plate sample table and a horn antenna matched with the flat plate sample table, the flat sample table comprises a cylindrical rod, a base, a rotating track, a table top and an inverted T-shaped metal panel which are connected with one another; the inverted T-shaped metal panel is driven to rotate along the circumferential direction when the rotating track on the table top rotates; the testing sample is arranged on one side face, facing the horn antenna, of a vertical panel of the inverted-T-shaped metal panel, and when the rotating track rotates in the circumferential direction, the inverted-T-shaped metal panel is driven to rotate in the circumferential direction, or the angle between the vertical panel and a horizontal panel of the T-shaped metal panel is adjusted, so that the testing sample is tested. And direction angles and pitch angles between the plane of the test sample and the horn antennas can be adjusted. The device has the advantages of being flexible and convenient to use, small in occupied area, capable of achieving multi-stage adjustment, high in testing precision and the like.

Disclosed example testing system sensor verification devices: a shaft; a body; and a force generator having a first predetermined force response, the first force generator coupled to the shaft and the body such that actuation of the shaft in a first direction from a predetermined position causes the force generator to generate the first predetermined force response.

The invention discloses a device and a method for testing wear resistance of a coating material in a high-temperature environment, and relates to the technical field of coating material testing, and the device comprises a workbench, a friction force loading mechanism, a test force loading mechanism, a high-temperature heating system, a force detection unit and a computer. The friction force loading mechanism provides stable friction force, the test force loading mechanism accurately applies test force, the high-temperature heating system creates a high-temperature environment, and the force detection unit detects force data in real time and transmits the force data to the computer for processing and analysis. The second driving mechanism is unique in structure and can accurately control test force loading, the circulating cooling unit is further arranged to protect the transmission shaft, the high-temperature furnace meets different temperature requirements, inert gas can be introduced to prevent high-temperature oxidation, and compared with a vacuum testing machine, the manufacturing cost can be greatly reduced. The problem that an existing detection device cannot accurately test the wear resistance of the coating material in a high-temperature environment is solved, and powerful support is provided for research, development and application of the coating material in the fields of aerospace and the like.

The invention relates to the technical field of material testing, and discloses aluminum magnesium alloy wire strength detection equipment which comprises a base and a controller, the top of the base is provided with a fixed seat, the base is provided with a movable seat through a first telescopic part, and a tension sensor is arranged between the first telescopic part and the movable seat; clamping mechanisms and locking mechanisms are arranged at the tops of the movable seat and the fixed seat and are used for clamping and fixing the two ends of the alloy wire; an environment simulation mechanism is arranged at the top of the base and is used for simulating different environment conditions of the alloy wire during detection; the environment simulation mechanism is arranged, the temperature and humidity in the sealing cover can be accurately adjusted, the experiment environment is adjusted in real time through a temperature adjusting instrument and a humidity adjusting instrument, different environment conditions are simulated, and therefore the mechanical performance of the alloy wire under various temperature and humidity conditions is evaluated; and the accuracy and comprehensiveness of a detection result are ensured.

The invention belongs to the field of material testing, and discloses a method and a system for testing a hydrogen-induced cracking threshold value based on a notched round rod tensile sample, the testing method comprises the following steps: in a hydrogen environment and an inert gas environment, respectively carrying out a slow strain rate tensile test on the notched round rod tensile sample to obtain test data and two elongation rates; the hydrogen embrittlement sensitivity index of the material is obtained through the two elongation rates; acquiring elastic-plastic parameters by using the hydrogen embrittlement sensitivity index of the material and test data; when the elastic-plastic parameter is greater than 3.5, acquiring a hydrogen induced cracking threshold value by adopting an elastic-plastic crack propagation mechanism; and when the elastic-plastic parameter is not greater than 3.5, a hydrogen induced cracking threshold value is obtained by adopting a linear elastic crack propagation mechanism. The test method is short in period, high in efficiency and high in universality.

The invention discloses a method for testing weather resistance of a material based on a low-temperature ice and snow environment, which belongs to the technical field of material testing, and comprises the following steps: generating a dynamic environment parameter set according to an environment simulation script, applying dynamically changing ice and snow loads and multiple physical and chemical environment stresses in a preset composite environment stress cabin, constructing a coupling environment field acting on the to-be-tested sample; and acquiring the state of the to-be-tested sample in the coupling environment field in real time, generating a multi-dimensional monitoring data set, performing comparative analysis on the multi-dimensional monitoring data set and a preset material aging characteristic template, generating material response data representing the current state of the to-be-tested sample, and constructing an environment parameter adjustment instruction set to regulate and control the coupling environment field in the composite environment stress cabin in real time. According to the method, a closed-loop feedback control strategy combining construction of a dynamic coupling environment field and real-time monitoring of material response is adopted, intelligent acceleration of the testing process can be achieved on the premise that the authenticity of a failure mechanism is guaranteed, and the testing efficiency and the accuracy of a result are remarkably improved.

The invention relates to the technical field of wind power blade material testing, and discloses a testing device and method for a salt spray corrosion test of a wind power blade composite material layer. According to the method, wind power blade composite material coating preparation parameters are obtained, and coating basic information is provided for subsequent performance evaluation; based on preset salt spray test environment control parameters, dynamic salt spray environment simulation conditions are generated so as to better fit the actual outdoor environment; then, a multi-sensor coupling monitoring network is constructed, real-time data acquisition is conducted on the corrosion process of the composite material coating, and comprehensive tracking of the corrosion process is achieved; processing real-time data by utilizing a corrosion characteristic analysis algorithm, generating a multi-dimensional corrosion characteristic index, and quantitatively representing the corrosion condition of the coating; and finally, evaluating the anti-corrosion stability of the new material coating in combination with the coating characteristic parameters and the multi-dimensional corrosion characteristic indexes. According to the method, the corrosion resistance of the coating in the actual environment can be more accurately reflected, and support is provided for research, development and application of the composite coating of the wind power blade.

The invention relates to the technical field of material detection, in particular to a silver coating adhesive force detection method based on multi-frequency impedance imaging, which comprises the following steps: applying a dual-mode multi-frequency excitation signal to the surface of a silver coating through an attached microelectrode array, synchronously acquiring voltage-current response data, and generating a dual-mode multi-frequency impedance original data set; performing time-varying impedance phase-locked separation on the dual-mode multi-frequency impedance original data set, extracting a dynamic impedance component of a coating-matrix interface region, and reconstructing a three-dimensional sub-interface impedance distribution diagram; and outputting an adhesive force quantized value through an oscillation frequency-adhesive force conversion model according to the spatial oscillation frequency characteristics of the impedance phase in the three-dimensional sub-interface impedance distribution diagram. According to the invention, a double-phase-locked loop system is adopted to realize the time-varying component demodulation of the impedance response of the silver coating-matrix interface, the low-frequency dynamic impedance signal modulated by silver ion migration is effectively extracted, and the weak change of the interface bonding state is sensitively reflected.

The invention relates to the technical field of metal plastic forming, and discloses a titanium alloy radial forging reduction rate collaborative optimization method based on material testing, which comprises the following steps of: acquiring dynamic characteristic data in a forging process in real time by acquiring multi-dimensional material performance parameters, and constructing a multi-target collaborative optimization model; and intelligent collaborative configuration of the reduction rate parameters is realized by adopting a self-adaptive weight distribution strategy. And a thermal coupling factor normalization equation and a phase field free energy functional normalization model are established, and the technical problems that in a traditional forging process, due to empirical configuration of reduction rate parameters, the structure is uneven, and residual stress exceeds the standard are solved. A lightweight model is deployed through edge computing nodes, millisecond-level dynamic correction of an optimization scheme is realized in combination with a 5G industrial private network, and the grain size qualification rate and the size precision of the titanium alloy forgings are improved. The method improves the yield of the grain size of the forge piece, ensures that the residual stress of the forge piece is reduced, stably controls the size precision, and improves the batch stability of high-end titanium alloy parts.

The present application relates to the technical field of metal plastic forming, and discloses a titanium alloy radial forging reduction rate collaborative optimization method based on material testing, which acquires dynamic characteristic data of a forging process in real time through multi-dimensional material performance parameter collection, constructs a multi-objective collaborative optimization model, and realizes intelligent collaborative configuration of the reduction rate parameter by using an adaptive weight distribution strategy. A thermal coupling factor normalization equation and a phase field free energy functional normalization model are established to solve the technical problems of uneven structure and excessive residual stress caused by the empirical configuration of the reduction rate parameter in the traditional forging process. A lightweight model is deployed through an edge computing node, and millisecond-level dynamic correction of the optimization scheme is realized in combination with a 5G industrial private network, thereby improving the grain size qualification rate and size accuracy of titanium alloy forgings. The present application improves the grain size qualification rate of forgings, ensures stable control of the size accuracy while reducing the residual stress of forgings, and improves the batch stability of high-end titanium alloy components.

The invention discloses a material deformation collaborative acquisition test method, device and equipment and a storage medium, and relates to the technical field of material testing, and the method comprises the following steps: carrying out EBSD calibration on the sample surface of a to-be-tested sample; preparing speckles on the surface of the sample and carrying out in-situ loading so as to carry out DIC determination; removing speckles on the target to-be-tested sample, and returning to execute the step of EBSD calibration based on the to-be-tested sample after speckle removal until in-situ loading of the target to-be-tested sample reaches a preset loading target; and determining an EBSD test result and a DIC test result based on the obtained measurement results of the internal grain orientation information and the material strain information of each sample to be tested. The method does not need to consider the influence of DIC on EBSD calibration, breaks through the limitation of the electron beam on the size of speckle particles or the size of a DIC observation area in EBSD calibration, and improves the test efficiency of material deformation collaborative collection.

The invention discloses a multi-axis multi-field coupling fatigue test device, and belongs to the technical field of material testing. The device comprises a rack, a multi-axis loading unit, an environment simulation unit, a dynamic sealing interface and a cooperative control system. The core of the device is that the test sample can simultaneously bear the coupling effect of multi-axis mechanical stress (pulling, pressing and twisting) and various environmental fields (such as high and low temperatures, corrosive media, illumination and electric fields) through a highly integrated design; and the dynamic sealing problem of the actuator rod in the environment box is solved through an innovative dynamic sealing interface (such as labyrinth-magnetofluid composite sealing). According to the invention, accurate linkage control of multiple channels is realized through the cooperative control system, the service environment of key parts under actual complex working conditions can be truly simulated, and a reliable test platform is provided for failure analysis and life prediction of products under multi-field coupling.

An apparatus for material testing of a specimen. The apparatus-includes a specimen holder for holding a specimen to be tested, a rod arrangement for moving in direction to the specimen holder for transmitting a mechanical load to the specimen, an actuator for moving at least one of the rod arrangement and the specimen holder with respect to each other along a horizontal impact direction, and a supporting base, onto which the specimen holder, the rod arrangement and the actuator are mounted. A specimen holder arrangement is detachably coupled to a holder accommodation section of the supporting base.

The utility model relates to a rotary sample holder and an oven in the technical field of material testing. The rotary sample holder comprises a main shaft; the two circular ring fixers are coaxially arranged on the main shaft respectively, and the two circular ring fixers are arranged on the main shaft in a spaced mode; the plurality of sample holders are uniformly divided into two groups, and the two groups of sample holders are respectively mounted on the two circular ring fixers; the driver is arranged on the main shaft and used for driving the main shaft to rotate around the axis of the main shaft. The rotary sample holder can ensure that each group of samples are heated consistently and uniformly in the test process, and the accuracy of a rubber aging test result is improved.

The invention discloses a soft soil reinforcement material performance analysis method and system, particularly relates to the technical field of material testing, and is used for solving the problem that an existing discretization testing method cannot accurately judge a material performance stabilization critical time point. Performance parameter time sequence data are obtained through continuous monitoring of a sensor, the mode stability quantity representing evolution characteristic consistency and the complexity equilibrium quantity representing multi-time scale behavior regularity are calculated, candidate critical points are identified when the mode stability quantity and the complexity equilibrium quantity are continuously higher than and lower than set threshold values respectively, and then the candidate critical points are identified through comparison verification with a standard performance development envelope band. Finally, an effective performance stabilization critical time point is output, continuous monitoring and accurate analysis of the whole material performance development process are achieved, and a reliable technical means is provided for performance evaluation of the soft soil reinforcement material.

The invention discloses a method and a device for testing dry and wet wear resistance of a textile. A method and device for testing dry and wet wear resistance of a textile belong to the technical field of material testing, and the method comprises the following steps: adjusting a test environment to a dry state, and recording initial state data of a textile sample; infiltrating the plurality of groups of textile samples to different degrees, and recording initial infiltrating state data of the textile samples; the stress condition in actual use is simulated; respectively performing reciprocating friction of the same operation on the surfaces of the dry textile sample and the wet textile sample, and recording the friction frequency and the abrasion condition; performing data preprocessing on the initial state data, the initial infiltration state data and the test result to obtain preprocessed data; and establishing a mathematical model according to the preprocessed data to analyze the dry-wet wear resistance. By testing the wear resistance in the dry and wet states, the dry and wet properties of the textile product can be measured in multiple aspects, and the problem of incomplete testing in the prior art is solved.

The invention relates to the technical field of building material detection, and discloses an automatic experimental device for building material detection, which comprises a conveyor belt support, the upper surface of the conveyor belt support is fixedly connected with a fixed support I, the conveyor belt is arranged in the conveyor belt support, the fixed support I is internally fixedly connected with an air cylinder, and the air cylinder is fixedly connected with a fixed support II. And the output end of the air cylinder is fixedly connected with a pressing plate, the two sides of the interior of the pressing plate are rotationally connected with second connecting rods, and one end of each second connecting rod is slidably connected with a pushing rod. Through cooperative operation of components such as an air cylinder, a pressing plate, a second connecting rod and a pushing rod, building materials placed on the conveying belt can be automatically clamped, fixed and positioned to the middle of the conveying belt, and compared with a traditional manual positioning mode, the automatic positioning structure remarkably improves the accuracy and stability of positioning of the building materials; detection result errors caused by material position deviation are avoided, and a solid foundation is laid for subsequent detection.

The invention discloses a metal material low-temperature fracture toughness testing device for a fatigue testing machine, relates to the technical field of material mechanical property testing, and solves the problem that room-temperature and low-temperature material testing cannot be performed on the same testing device. The device comprises a test barrel, an inner container, an extensometer, an upper joint and a lower joint, wherein the inner container is arranged in the test barrel; the extensometer is in contact with the sample and returns a real-time mechanical signal; the upper end of the upper connector is connected with a hydraulic chuck above the fatigue testing machine, and the lower end of the lower connector penetrates through the inner container and the testing barrel to be connected with a hydraulic chuck below the fatigue testing machine; the upper joint and the lower joint are opposite to each other and are used for clamping a sample; a sealing structure is arranged between the lower connector and the inner container. According to the invention, a testing machine does not need to be transformed, testing conditions for samples with different sizes are obtained by replacing different accessories, and meanwhile, a testing clamp can be replaced to test the mechanical properties of materials under different environmental conditions.

The invention relates to the technical field of heating element detection, and discloses a heating element material testing device and method and a storage medium, and the heating element material testing method comprises the steps: obtaining a testing mode and testing parameters; when a test instruction is received, initial resistance value detection is carried out on the heating body material; and when the heating element material passes the initial resistance value detection, performing a power calibration test and / or a power-on test on the heating element material according to the test mode and the test parameters, and displaying a test result. According to the technical scheme, by flexibly setting the test mode and the test parameters, accurate detection and performance evaluation of the heating element material are achieved, and reliable reference data can be provided for subsequent tests through initial resistance detection; the power calibration test ensures the consistency of the heating body under different power conditions, and the power-on test simulates the performance in an actual working state, so that whether the material of the heating body meets the design requirements or not can be quickly judged, and an efficient and reliable solution is provided for product quality control.

Materials testing probe (1) for a materials testing device (100), comprising: - a support (3) adapted to be coupled to said materials testing device (100); - a passive beam (5) having a length less than 5mm and extending from said support (3) along a primary axis (A), said beam (5) having a distal extremity (5c) adapted to cooperate with a sample (105) under test at least in a direction parallel to said primary axis (A). Said beam (5) comprises at least one measurement strain gauge (7) configured to measure deformation of said beam (5) at least in a direction parallel to said primary axis (A).

According to the in-situ determination method for the time-varying performance parameters of the 3D printing concrete material, the time-varying performance parameters of the concrete can be deduced without traditional material tests by utilizing an inversion strategy combining numerical simulation and machine vision technologies. The method comprises the following steps: firstly, setting to-be-tested parameters based on a constitutive model of the early-age 3D printing concrete; then, different values of the parameters are set for numerical simulation, and each group of simulation generates a corresponding structural deformation result. Secondly, deformation data in the actual 3D printing process is obtained through a machine vision technology and serves as a reference standard; and by comparing the deformation result of each group of numerical simulation with the actual measurement data, reversely deducing the time-varying performance parameter which most accords with the actual condition. According to the method, the concrete time-varying material parameters are measured on the premise that the printing process is not interfered, monitoring of the printing process can be enhanced, and a foundation is laid for verification of an early-age mechanical model and proposing of a new constitutive model driven by data.

A material testing system that uses at least one hydraulic grip is improved with cable clips that are attachable to a respective lateral side of each hydraulic grip wedge. Each cable clip has another end that extends to engage a cable(s) extending from a corresponding wedge retention spring hole. The cable(s) enable manual extension of a wedge retention spring for engagement and disengagement from the hydraulic grip wedge. The cable clip maintains the cable in a noninterfering position during operational use of the material testing system.

The invention relates to the field of metal material testing, in particular to equipment for testing material performance, which comprises a testing platform, the testing platform is provided with a detection mechanism, a supporting mechanism, an extrusion mechanism and a power mechanism, the extrusion mechanism and the power mechanism are arranged on the supporting mechanism, and the extrusion mechanism comprises an extrusion block and a reversing unit for adjusting the orientation change of the extrusion block. At least one end of the extrusion block is open, the extrusion block is used for shearing and crushing a to-be-tested substrate, and a rotating handle is arranged on the extrusion block; and the power mechanism comprises a shearing driving unit and a pressure driving unit which are used for driving the extrusion block to move. By implementing the scheme, the test efficiency of the magnesium alloy material under various test conditions is improved.

The invention relates to a method for testing the extrudability of an epoxy adhesive for prefabricated segment assembly, and belongs to the technical field of material testing. Comprising the following steps: S1, placing a sample preparation device at a specified test temperature for 24 hours; s2, placing the annular polytetrafluoroethylene mold coated with vaseline at the mark of the first circular polyester film, and filling the annular polytetrafluoroethylene mold with the splicing glue sample; s3, slowly and vertically lifting the polytetrafluoroethylene annular mold to obtain a complete cylindrical splicing glue extrudability to-be-tested sample; s4, immediately putting the sample to be tested and the polyester film on a steel bearing plate of a universal testing machine; s5, applying specified pressure to obtain a cake-shaped splicing glue sample; s6, measuring and calculating the extrudability of the splicing glue sample; and S7, repeating the steps, and taking an arithmetic mean value of the extrudability. The problems of accuracy and reliability in the testing process can be effectively solved.

The invention belongs to a testing and processing method, and provides a single-probe non-contact dielectric material testing and processing integrated system and a single-probe non-contact dielectric material testing and processing integrated method in order to solve the technical problems of poor real-time performance and controllability and low production efficiency of the existing dielectric material testing and processing technology. Comprising a controllable objective table, a resonant cavity single probe assembly, a programmable multi-way switch and a control unit, a single epitaxial microwave resonant cavity probe is adopted as a core component, and rapid switching and regulation of the resonant cavity single probe assembly, a vector network analyzer and a program control microwave signal generation and regulation device are realized through the programmable multi-way switch. By means of the testing and processing integrated system, non-contact type dielectric constant dynamic measurement and microwave processing can be alternately completed.

The invention relates to the technical field of material testing, and discloses a phase change temperature calibration method and system for a phase change material, and the method comprises the steps: collecting the surface temperature distribution data and crystal structure parameters of the phase change material based on a bimodal synchronous monitor, and building a temperature-structure incidence matrix; when the parameters of the crystal structure suddenly change, determining surface temperature distribution data corresponding to a sudden change moment based on the temperature-structure incidence matrix, and calculating an initial phase change temperature interval; constructing a nonlinear mapping model of the initial phase-change temperature interval and the heating rate, and performing dynamic compensation on the initial phase-change temperature interval based on the nonlinear mapping model to obtain a corrected phase-change temperature; inputting the corrected phase change temperature into a gradient temperature control module containing a standard sample; and comparing the offset of the actual phase change position and the theoretical position of the reference material, and reversely correcting and correcting the phase change temperature based on the offset to obtain the final calibration temperature. The calibration accuracy of the phase change temperature of the phase change material can be improved.

The invention discloses a tensile bending and thermal stress combined test device and method, and belongs to the technical field of material testing, the device comprises a support frame, and the support frame is provided with a mechanical tensile device and a three-point bending device; the mechanical stretching device comprises a first sliding base, a second sliding base, a two-way threaded rod, a first clamping assembly and a second clamping assembly, and the middle of the first sliding base and the middle of the second sliding base are connected with the two-way threaded rod through threaded structures. The top ends of the first sliding base and the second sliding base are fixedly connected with a first clamping assembly and a second clamping assembly respectively, a sample is fixed between the first clamping assembly and the second clamping assembly, and the tensile force of the sample is detected by rotating a bidirectional threaded rod; the three-point bending device is arranged at the top of the supporting frame, and the bending force of the sample is detected through downward pressing of the three-point bending device. According to the invention, a stretching-bending-thermal stress combined aging test is carried out on a hot melt adhesive bonding sample under a set condition, and the performance of a hot melt adhesive layer under a long-term operation condition is tested.

The invention relates to the technical field of construction material testing, and provides a tunnel construction material waterproof performance testing device which comprises a freezing and thawing test box, a machine box and a rack, a pressurized water injection system and a sealing slotting mechanism are arranged in the rack side by side, and the pressurized water injection system comprises a jack and a water pressure system; the jack is used for detecting the bearing load strength of the material test block, and the water pressure system is used for pressurizing water and detecting the waterproof performance of the material test block under high load. The tunnel construction material waterproof performance testing device integrates pressure resistance, erosion resistance, freezing resistance and waterproof performance detection tests on construction materials, can simulate the overall state of the construction materials in different tunnel environments to perform waterproof performance tests, so that the construction materials are added according to different tunnel requirements to improve the waterproof performance, and meanwhile, through the arrangement of the sealing slotting mechanism, the waterproof performance of the tunnel construction material is improved. The contact surface of the material test block and the water pressure system can be subjected to sealing waterproof treatment, and water is prevented from overflowing from the contact surface during water seepage detection.